cpp
int 组合数(int n, int m)
{//缘由https://ask.csdn.net/questions/8074182
long long nj = 1, mj = 1, nmj = 1, nm = n - m;
jc:if (n)
{
nj *= n;
if (m)mj *= m, --m;
if (nm)nmj *= nm, --nm;
--n;
goto jc;
}
std::cout << nj << "/" << mj << "*" << nmj << "=";
return nj / (mj * nmj);
}


我以此施而自庄严,不求人天无常,愿真正无上道成,若获无尽宝藏施无逆意。